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Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of intangible assets
   As of
December 31,		 
   2021   2020 
Intangible assets: patents  $23,963   $21,604 
Less: amortization   (4,654)   (3,529)
Total intangible assets, net  $19,309   $18,075